Eyeglass mounting



C. M. HAYNES.

EYEGLASS MOUNTING.

APPLICATION FILED MAR. 23. 1921.

Patented Jan. 31, 1922.

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cnantns M. aynes, or cnrttrco'rnn, onro.

V EYEGLASS MOUNTING.

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T0 .aZZ era/10m it WWI/I/ concern Be it known that l, CHinLn'slv L HAYNES,

Zen of the United States of America,

' hillicothe, in the county I of nd iitate of Ohio. have invented cer- I a and useful. ln pr vcnients in Eyelilountings, of which the following is U ull. clear, and exact description.

llhe mechanism of linger-piece eyeglass mountings is necessarily minute, and hence inhsoine types theparts soon show the wear and looseness resulting :trom the hard usage to which such mountingsare often, indeed usually, subjected. Many persons. not realizing the delicacy of the parts,seize the linger-levers with ez zcessive force, thereby straining the lever and its fulcrum, and causing rapid wear. Er y present'invention has for its chief object to provide a mounting which will stand up for a long period, even under abuse. A further ob ect is to provide a mounting for the lever and spring which can be applied as a repair part to most if not all existing types of finger-piece glasses, thereby making on old and worn mounting as good as new, and in many cases better than new. To these and other ends the invention consists in the novel features hereinafter described.

One form of the invention is illustrated in the accompanying drawing, in which Fig. 1 is a front view, partly in section,

showing my improved mounting as applied in the preferred manner.

Fig. 2 is a detail side view of the tulcruinpost and spring support. D h

if 3 is'a detail perspective view of the spring used in 1 to rock the lever.

In the drawing, which shows only one side of the mounting, 10 represents the bridge-piece, provided with the usual strap 11 and arms 12 for attachment to the lens 13.

At a point adjacent to the strap 11 and arms 12 the bridge 10 is provided with a hole 141 extending vertically through it, to receive the cylindrical post 15. The latter is tubular, and is threaded internally at each end to receive the screws 16, 17, which, in the preferred form of the invention, are interchangeable.

About midway between its ends the post 15 is provided with a circumferential rib 18 which serves as the bearing for the fin Specification of Letters Patent.

'of being stripped.

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Application filed March 23, 1921. Serial No. 454,702.

up the post is drawn downand the rib seated firmly on the bridge, thereby making the post and the bridge practically one piece. it will atonce been seen that the stresses exerted on the post by actuation of the lever ar for the most part shearing or bend ing stresses with.notendency to pull the post out of the bridge. Hence the threads on the screw and in the post are in no danger flange 20 is far enough above the lever to prevent the latter from being cramped when the screw 16 is set up, and hence the lever can swing freely no matter how firmly the rib 18 is drawn down upon the bridge.

The spring 521, of the helical type, with its ends 22, extended to engage the lever 19 and one of: the arms 12, is seated on the post above the flange 20 and hence need not exert any downward pressure on the lever even if the coiled portion of the spring is of such height as to be compressed by the retaining screw 11" when the latter is set up. As an aid in assembling the parts the two ends of the spring may be held under tension by a or link 24;, l 8, thus making it easy to slip the spring over the post.

One of the most important advantages of the invention is its convenience and adaptability in repairing eyeglass mountings which are so worn or loose as to be unserviceable. In such case it is usually necessary to supply even a new lever. in applying my invention, the Optician drills or reams out a hole in the bridge to fit the post, and files down the lower end of the post if too long. The parts can then be assembled, making the mounting as good as or better than new. If the original lever is to be used, it may be necessary to file it down so that it will fit under the flange 20, or put a washer under it if too thin, or round out the hole to correct unevenness due to wear and make it fit the collar 18 properly. In any case the work is of the simplest character and makes but little demand upon the skill of the work- At the same time the.

man. For repair purposes the Optician will find it desirable to keep on hand a stock of levers and posts.

It is to be understood that the invention is not limited to the specific details herein illustrated and described but can be embodied in other forms without departure from its spirit.

I claim:

1. In an eyeglass mounting, a bridge having means for holding a lens and provided with an opening extending vertically through it adjacent to the lens-holding means; a post threaded internally at its lowerend and having a circumferential rib and having also a radial flange overhanging said rib, said post being fitted in said opening; a screw in the lower end of thepost and serving to hold the post in the opening with the Said circumferential rib firmly seated on the upper edge of the opening; a finger lever fulcrumed on said rib and underlying said flange; a coil spring associated with the post above the flange and confined at its lower end by said flange and serving to urge the lever in one direction and a member detachably secured to the top of the post and removably holding the spring in place against said flange. V

2. In an eyeglass mounting a tubular post threaded internally at both ends, having an intermediate circumferential rib adapted to serve as a fulcrum for a finger lever and having a circumferential flange extending radially beyond the rib above the latter, a

bridge having an'aperture in which the post is fitted with said rib seatedon the upper surface, a screw in the lower end of the post to draw the same down and hold it in place, a finger lever fulcrunied on the said rib under the flange, a spring mounted on the upper portion of the post and cooperating with the lever to actuate the same, said flange abutting against and confining the spring at its lower end, and a removable spring-retaining screw in the upper end of the post abutting against the upper end of the spring and detachably retaining the spring on the post.

In testimony whereof I hereto am my signature.

CHARLES M. HAYNES. 

